The role of biological carbon pump in the carbon sink and water environment improvement in karst surface aquatic ecosystems

Climatic and anthropogenic regulation of carbon transport and transformation in a karst river-reservoir system

“…In addition, photosynthesis can increase pH and cause calcium carbonate precipitation (Chen and Liu, 2017;Millo et al, 2012;Vuorio et al, 2006) (f2) and accelerate the decomposition of POC and DOC in the bottom region (f3) (Kumar et al, 2019b;Wang et al, 2019c). A 14 C tracer method also showed that the presence of CaCO3 in the sediment would affect the condition of soil aggregates and pH and promote the decomposition of organic matter (Motavalli et al, 1995).…”

Hydrological effects of vegetation restoration in karst areas research: Progress and challenges

“…Vegetation restoration is an important way to improve the degraded ecological environment in karst areas, and planted forests and naturally restored vegetation have made significant contributions to the hydrological function of degraded karst ecosystems while increasing vegetation cover (Li et al, 2022a). Two of the most important processes for absorbing carbon dioxide on Earth are the photosynthesis of plants (biological action) and the chemical dissolution of rocks (silicate and carbonate rocks) (geological action)(Chen and Liu, 2017; Liu, 2012; Wu and Wu, 2022). Bicarbonate utilization by plants is a driver of karstification–photosynthesis coupling, which depends on plant species and the environment (Gaillardet and Galy, 2008; Yuan, 1999).…”

“…Karst-adaptable plants can efficiently promote root-derived bicarbonate and atmospheric carbon dioxide use by plants, finally achieving the conjugate promotion of karstic carbon sinks and photosynthetic carbon sinks (Larson, 2011; Yuan, 1999). Theoretically, the carbon sink capacity of an eight-year-old woody plant with karstification–photosynthesis coupling of 10% will be twice that without karstification–photosynthesis coupling (Chen and Liu, 2017; Liu, 2011). Wu and Wu (2022) have reported that the carbon sink capacity of a 10-year woody plant with a karstification photosynthesis coupling of 10% is 1.6 times that with a karstification–photosynthesis coupling of 5% (1.10 10 /1.05 10 ); thus, the karst carbon sink capacity is 3.2 times that of the latter.…”